ENGINE
B2420, WSM
1-S1
1. TROUBLESHOOTING
Symptom Probable Cause Solution
Reference
Page
Engine Does Not
Start
No fuel Replenish fuel G-8
Air in the fuel system Bleed G-31
Water in the fuel system Change fuel and
repair or replace fuel
system
–
Fuel hose clogged Clean G-24
Fuel filter clogged Clean or Change G-22
Excessively high viscosity of fuel or engine oil at
low temperature
Use specified fuel or
engine oil
G-8
Fuel with low cetane number Use specified fuel G-9
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut 1-S28
Incorrect injection timing Adjust 1-S15
Fuel camshaft worn Replace 1-S32
Injection nozzle clogged Clean 1-S18
Injection pump malfunctioning Repair or replace 1-S32
Seizure of crankshaft, camshaft, piston, cylinder
or bearing
Repair or replace 1-S36
1-S38
Compression leak from cylinder Replace head gasket,
tighten cylinder head
screw, glow plug and
nozzle holder
1-S10
Improper valve timing Correct or replace
timing gear
1-S33
Piston ring and cylinder worn Replace 1-S49
Excessive valve clearance Adjust 1-S11
Stop solenoid malfunctioning Replace 9-S16
Main gear shift switch malfunctioning Adjust or replace 9-S13
Rear PTO switch malfunctioning Adjust or replace 9-S14
Starter Does Not Run Battery discharged Charge G-20
Starter malfunctioning Repair or replace 9-S33
Main switch malfunctioning Repair or replace 9-S13
Main gear shift switch malfunctioning Adjust or replace 9-S13
Rear PTO switch malfunctioning Adjust or replace 9-S14
Wiring disconnected Connect –
Engine Revolution Is
Not Smooth
Fuel filter clogged or dirty Clean or replace G-22
Air cleaner clogged Clean or replace G-22
Fuel leak due to loose injection pipe retaining nut Tighten retaining nut 1-S28
Injection pump malfunctioning Repair or replace 1-S32
Incorrect nozzle injection pressure Adjust 1-S17
Injection nozzle stuck or clogged Repair or replace 1-S18
Governor malfunctioning Repair 1-S33
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